function paginas (url, id_contenedor)
{
    var pagina_requerida = false;
    if (window.XMLHttpRequest)
    {
        pagina_requerida = new XMLHttpRequest ();
    } else if (window.ActiveXObject)
    {
        try 
        {
            pagina_requerida = new ActiveXObject ("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try
            {
                pagina_requerida = new ActiveXObject ("Microsoft.XMLHTTP");
            }
            catch (e)
            {
            }
        }
    } 
    else
    return false;
    pagina_requerida.onreadystatechange = function ()
    {
        cargarpagina (pagina_requerida, id_contenedor);
    }
    pagina_requerida.open ('GET', url, true);
    pagina_requerida.send (null);
}
function cargarpagina (pagina_requerida, id_contenedor)
{
    if (pagina_requerida.readyState == 4 && (pagina_requerida.status == 200 || window.location.href.indexOf ("http") == - 1))
    document.getElementById (id_contenedor).innerHTML = pagina_requerida.responseText;
}


/*------------------------------------------------- Inicio de la Funcion ------------------------------------------*/


function sack(file) { 
this.xmlhttp = null; 

this.resetData = function() { 
this.method = "POST"; 
this.queryStringSeparator = "?"; 
this.argumentSeparator = "&"; 
this.URLString = ""; 
this.encodeURIString = true; 
this.execute = false; 
this.element = null; 
this.elementObj = null; 
this.requestFile = file; 
this.vars = new Object(); 
this.responseStatus = new Array(2); 
}; 

this.resetFunctions = function() { 
this.onLoading = function() { }; 
this.onLoaded = function() { }; 
this.onInteractive = function() { }; 
this.onCompletion = function() { }; 
this.onError = function() { }; 
this.onFail = function() { }; 
}; 

this.reset = function() { 
this.resetFunctions(); 
this.resetData(); 
}; 

this.createAJAX = function() { 
try { 
this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e1) { 
try { 
this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (e2) { 
this.xmlhttp = null; 
} 
} 

if (! this.xmlhttp) { 
if (typeof XMLHttpRequest != "undefined") { 
this.xmlhttp = new XMLHttpRequest(); 
} else { 
this.failed = true; 
} 
} 
}; 

this.setVar = function(name, value){ 
this.vars[name] = Array(value, false); 
}; 

this.encVar = function(name, value, returnvars) { 
if (true == returnvars) { 
return Array(encodeURIComponent(name), encodeURIComponent(value)); 
} else { 
this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true); 
} 
} 

this.processURLString = function(string, encode) { 
encoded = encodeURIComponent(this.argumentSeparator); 
regexp = new RegExp(this.argumentSeparator + "|" + encoded); 
varArray = string.split(regexp); 
for (i = 0; i < varArray.length; i++){ 
urlVars = varArray[i].split("="); 
if (true == encode){ 
this.encVar(urlVars[0], urlVars[1]); 
} else { 
this.setVar(urlVars[0], urlVars[1]); 
} 
} 
} 

this.createURLString = function(urlstring) { 
if (this.encodeURIString && this.URLString.length) { 
this.processURLString(this.URLString, true); 
} 

if (urlstring) { 
if (this.URLString.length) { 
this.URLString += this.argumentSeparator + urlstring; 
} else { 
this.URLString = urlstring; 
} 
} 

// prevents caching of URLString 
this.setVar("rndval", new Date().getTime()); 

urlstringtemp = new Array(); 
for (key in this.vars) { 
if (false == this.vars[key][1] && true == this.encodeURIString) { 
encoded = this.encVar(key, this.vars[key][0], true); 
delete this.vars[key]; 
this.vars[encoded[0]] = Array(encoded[1], true); 
key = encoded[0]; 
} 

urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0]; 
} 
if (urlstring){ 
this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator); 
} else { 
this.URLString += urlstringtemp.join(this.argumentSeparator); 
} 
} 

this.runResponse = function() { 
eval(this.response); 
} 

this.runAJAX = function(urlstring) { 
if (this.failed) { 
this.onFail(); 
} else { 
this.createURLString(urlstring); 
if (this.element) { 
this.elementObj = document.getElementById(this.element); 
} 
if (this.xmlhttp) { 
var self = this; 
if (this.method == "GET") { 
totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString; 
this.xmlhttp.open(this.method, totalurlstring, true); 
} else { 
this.xmlhttp.open(this.method, this.requestFile, true); 
try { 
this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded") 
} catch (e) { } 
} 

this.xmlhttp.onreadystatechange = function() { 
switch (self.xmlhttp.readyState) { 
case 1: 
self.onLoading(); 
break; 
case 2: 
self.onLoaded(); 
break; 
case 3: 
self.onInteractive(); 
break; 
case 4: 
self.response = self.xmlhttp.responseText; 
self.responseXML = self.xmlhttp.responseXML; 
self.responseStatus[0] = self.xmlhttp.status; 
self.responseStatus[1] = self.xmlhttp.statusText; 

if (self.execute) { 
self.runResponse(); 
} 

if (self.elementObj) { 
elemNodeName = self.elementObj.nodeName; 
elemNodeName.toLowerCase(); 
if (elemNodeName == "input" 
|| elemNodeName == "select" 
|| elemNodeName == "option" 
|| elemNodeName == "textarea") { 
self.elementObj.value = self.response; 
} else { 
self.elementObj.innerHTML = self.response; 
} 
} 
if (self.responseStatus[0] == "200") { 
self.onCompletion(); 
} else { 
self.onError(); 
} 

self.URLString = ""; 
break; 
} 
}; 

this.xmlhttp.send(this.URLString); 
} 
} 
}; 

this.reset(); 
this.createAJAX(); 
} 



var enableCache = true; 
var jsCache = new Array(); 

var dynamicContent_ajaxObjects = new Array(); 

function ajax_showContent(divId,ajaxIndex,url) 
{ 
var targetObj = document.getElementById(divId); 
targetObj.innerHTML = dynamicContent_ajaxObjects[ajaxIndex].response; 
if(enableCache){ 
jsCache[url] = dynamicContent_ajaxObjects[ajaxIndex].response; 
} 
dynamicContent_ajaxObjects[ajaxIndex] = false; 

ajax_parseJs(targetObj) 
} 

function ajax_parseJs(inputObj) 
{ 
var jsTags = inputObj.getElementsByTagName('SCRIPT'); 
for(var no=0;no<jsTags.length;no++){ 
eval(jsTags[no].innerHTML); 
} 
} 

function ajax_loadContent(divId,url) 
{ 
if(enableCache && jsCache[url]){ 
document.getElementById(divId).innerHTML = jsCache[url]; 
return; 
} 

var ajaxIndex = dynamicContent_ajaxObjects.length; 
document.getElementById(divId).innerHTML = 'Cargando Página - <a href="http://tuarroberos.blogcindario.com" target="_blank">Visita Blog Tuarroba</a>'; 
dynamicContent_ajaxObjects[ajaxIndex] = new sack(); 
dynamicContent_ajaxObjects[ajaxIndex].requestFile = url; // Specifying which file to get 
dynamicContent_ajaxObjects[ajaxIndex].onCompletion = function(){ ajax_showContent(divId,ajaxIndex,url); }; // Specify function that will be executed after file has been found 
dynamicContent_ajaxObjects[ajaxIndex].runAJAX(); // Execute AJAX function 


} 
/*------------------------------------------------- Fin de la Funcion ------------------------------------------*/